163243641 has 24 divisors (see below), whose sum is σ = 241196032. Its totient is φ = 98128800.

The previous prime is 163243631. The next prime is 163243651. The reversal of 163243641 is 146342361.

It is an interprime number because it is at equal distance from previous prime (163243631) and next prime (163243651).

It is not a de Polignac number, because 163243641 - 2²² = 159049337 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 163243599 and 163243608.

It is not an unprimeable number, because it can be changed into a prime (163243601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44331 + ... + 47871.

Almost surely, 2^163243641 is an apocalyptic number.

163243641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

163243641 is a deficient number, since it is larger than the sum of its proper divisors (77952391).

163243641 is a wasteful number, since it uses less digits than its factorization.

163243641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693 (or 3682 counting only the distinct ones).

The product of its digits is 10368, while the sum is 30.

The square root of 163243641 is about 12776.6834898576. The cubic root of 163243641 is about 546.5275898354.

The spelling of 163243641 in words is "one hundred sixty-three million, two hundred forty-three thousand, six hundred forty-one".